Rekensommen met erbij en eraf tot 100
In de mix
1.
20
30
+
=
2.
70
30
–
=
3.
20
10
+
=
4.
80
20
+
=
5.
80
70
–
=
6.
70
30
–
=
7.
30
20
–
=
8.
100
50
–
=
9.
90
70
–
=
10.
10
10
+
=
11.
90
60
–
=
12.
100
80
–
=
13.
30
70
+
=
14.
40
10
+
=
15.
40
20
–
=
16.
90
70
–
=
17.
40
20
–
=
18.
50
20
–
=
19.
50
40
–
=
20.
60
20
–
=
21.
90
80
–
=
22.
100
80
–
=
23.
60
30
–
=
24.
50
10
+
=